Jack and trees (overdone in fanon, imho. It's not so much Jack doesn't like trees. It's just noting how many times they see it (Daniel makes a point himself about how Abydos appears to be the exception when it comes non-forested worlds in another ep), but anyway, examples I've found:

Prisoners:
DANIEL: We practically just got here. We have no idea what this planet has to offer.

O'NEILL: Trees and moss.
[snipped additional dialogue]
O'NEILL: Ah! Ah! We'll, ah…flag it for an aerial survey. As much as I love a good rain forest…

Demons:

"Ah, trees, trees, and more trees. What a wonderfully green universe we live in, eh? Where's that village?"

Paradise Lost:
"I see trees, Harry. You get that in Colorado."

That's all I can recall offhand.